Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

doi:10.1016/j.cjche.2023.02.025

中国化学工程学报 ›› 2023, Vol. 60 ›› Issue (8): 293-303.DOI: 10.1016/j.cjche.2023.02.025

• Full Length Article • 上一篇

Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

Lijuan Zhao^1,2, Zhe Tan^1,2, Xiaoguang Zhang^1,2, Qijun Zhang^1,2, Wei Wang^1,2, Qiang Deng^1,2, Jie Ma³, De'an Pan^1,2

1. Institute of Circular Economy, Beijing University of Technology, Beijing 100124, China;
2. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;
3. China Ecological Civilization Research and Promotion Association, Beijing 100035, China

收稿日期:2022-10-15 修回日期:2023-02-09 出版日期:2023-08-28 发布日期:2023-10-28
通讯作者: Jie Ma,E-mail:majie1006@163.com;De'an Pan,E-mail:15801662924@139.com
基金资助:
This research was financially supported by the National Key Research and Development Program of China (2018YFC1903603).

Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

Lijuan Zhao^1,2, Zhe Tan^1,2, Xiaoguang Zhang^1,2, Qijun Zhang^1,2, Wei Wang^1,2, Qiang Deng^1,2, Jie Ma³, De'an Pan^1,2

1. Institute of Circular Economy, Beijing University of Technology, Beijing 100124, China;
2. Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China;
3. China Ecological Civilization Research and Promotion Association, Beijing 100035, China

Received:2022-10-15 Revised:2023-02-09 Online:2023-08-28 Published:2023-10-28
Contact: Jie Ma,E-mail:majie1006@163.com;De'an Pan,E-mail:15801662924@139.com
Supported by:
This research was financially supported by the National Key Research and Development Program of China (2018YFC1903603).

摘要/Abstract

摘要： In the reaction process of carbonate desulfurization lead paste, the produced PbCO₃ is easily wrapped in the outer periphery of PbSO₄ to form a product layer, hindering the mass transfer process. Therefore, it is necessary to break the PbCO₃ product layer. In this work, the rotor stator-reinforced reactor was selected as the enhanced desulfurization reactor for the purpose of breaking the PbCO₃ product layer and promoting mass transfer. The breakage process of the PbCO₃ product layer generated during the PbSO₄ desulfurization was modeled. Computational fluid dynamics simulation to the rotation conditions was carried out to theoretically analyze the fluid flow characteristics of PbSO₄ slurry and the wall shear stress affecting the breakage of PbCO₃ product layer. By optimizing the rotation conditions, the distribution ratio of effective rotor wall shear stress range achieved 96.1%, and the stator wall shear stress range reached 99.15% under a rotation of 2000 r·min^-1. The research work provides a reference for analysis of the mechanism of product layer breakage in the PbSO₄ desulfurization process, and gives a clear and intuitive systematic study on the fluid flow characteristics and wall shear stress of the desulfurization reactor.

关键词: Chemical reactors, Computational fluid dynamics, CFD, Simulation, Desulfurization, Core?shell structure

Abstract: In the reaction process of carbonate desulfurization lead paste, the produced PbCO₃ is easily wrapped in the outer periphery of PbSO₄ to form a product layer, hindering the mass transfer process. Therefore, it is necessary to break the PbCO₃ product layer. In this work, the rotor stator-reinforced reactor was selected as the enhanced desulfurization reactor for the purpose of breaking the PbCO₃ product layer and promoting mass transfer. The breakage process of the PbCO₃ product layer generated during the PbSO₄ desulfurization was modeled. Computational fluid dynamics simulation to the rotation conditions was carried out to theoretically analyze the fluid flow characteristics of PbSO₄ slurry and the wall shear stress affecting the breakage of PbCO₃ product layer. By optimizing the rotation conditions, the distribution ratio of effective rotor wall shear stress range achieved 96.1%, and the stator wall shear stress range reached 99.15% under a rotation of 2000 r·min^-1. The research work provides a reference for analysis of the mechanism of product layer breakage in the PbSO₄ desulfurization process, and gives a clear and intuitive systematic study on the fluid flow characteristics and wall shear stress of the desulfurization reactor.

Key words: Chemical reactors, Computational fluid dynamics, CFD, Simulation, Desulfurization, Core?shell structure

Lijuan Zhao, Zhe Tan, Xiaoguang Zhang, Qijun Zhang, Wei Wang, Qiang Deng, Jie Ma, De'an Pan. Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor[J]. 中国化学工程学报, 2023, 60(8): 293-303.

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Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor

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